Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between blade edge and static part
Patent
1992-01-21
1993-04-20
Look, Edward K.
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Between blade edge and static part
415 10, 415108, 415126, 4151733, F01D 520
Patent
active
052036731
ABSTRACT:
An apparatus is provided for controlling rotating blade tip clearance in a turbo-machine utilizing conical tipped blades. The apparatus comprises an approximately conical blade ring mounted for axially sliding displacement in the turbo-machine cylinder. The conical blade ring encircles the tips of the rotating blades and forms a blade tip clearance therebetween. The tip clearance is controlled during operation of the turbo-machine by axially displacing the conical blade ring. Piston cylinders, actuated by pressurized fluid extracted from the turbo-machine, are used to displace the blade ring. Springs, adapted to bias the blade ring into a position of increased tip clearance, oppose the piston cylinder so that failure of the piston cylinder will not result in a loss of tip clearance. A blade tip clearance sensor transmits information on the tip clearance to a controller that automatically adjusts the blade ring axial position to continuously maintain the optimum tip clearance by regulating the pressure of the fluid supplied to the piston cylinders.
REFERENCES:
patent: 3227418 (1966-01-01), West
patent: 3520635 (1970-07-01), Killmann et al.
patent: 4343592 (1982-08-01), May
patent: 4844688 (1989-07-01), Clough et al.
patent: 4987555 (1991-01-01), Twerdochlib
patent: 5035573 (1991-07-01), Tseng et al.
patent: 5056986 (1991-10-01), Silvestri, Jr. et al.
patent: 5056988 (1991-10-01), Corsmeier et al.
Look Edward K.
Verdier Christopher
Westinghouse Electric Corp.
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